US20110123143A1 - Retainer for roller bearing - Google Patents

Retainer for roller bearing Download PDF

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Publication number
US20110123143A1
US20110123143A1 US12/856,572 US85657210A US2011123143A1 US 20110123143 A1 US20110123143 A1 US 20110123143A1 US 85657210 A US85657210 A US 85657210A US 2011123143 A1 US2011123143 A1 US 2011123143A1
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United States
Prior art keywords
chamfered face
retainer
roller bearing
chamfered
sections
Prior art date
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Abandoned
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US12/856,572
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English (en)
Inventor
Young-Keun Lee
Cheol-Hwan Cha
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Schaeffler Korea Corp
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Schaeffler Korea Corp
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Filing date
Publication date
Priority claimed from KR1020090113767A external-priority patent/KR101076099B1/ko
Priority claimed from KR1020100038066A external-priority patent/KR20110118457A/ko
Application filed by Schaeffler Korea Corp filed Critical Schaeffler Korea Corp
Assigned to SCHAEFFLER KOREA CORP. reassignment SCHAEFFLER KOREA CORP. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: CHA, CHEOL-HWAN, LEE, YOUNG-KEUN
Publication of US20110123143A1 publication Critical patent/US20110123143A1/en
Abandoned legal-status Critical Current

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/66—Special parts or details in view of lubrication
    • F16C33/6637—Special parts or details in view of lubrication with liquid lubricant
    • F16C33/6681—Details of distribution or circulation inside the bearing, e.g. grooves on the cage or passages in the rolling elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/467—Details of individual pockets, e.g. shape or roller retaining means
    • F16C33/4676—Details of individual pockets, e.g. shape or roller retaining means of the stays separating adjacent cage pockets, e.g. guide means for the bearing-surface of the rollers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C33/00—Parts of bearings; Special methods for making bearings or parts thereof
    • F16C33/30—Parts of ball or roller bearings
    • F16C33/46—Cages for rollers or needles
    • F16C33/54—Cages for rollers or needles made from wire, strips, or sheet metal
    • F16C33/542—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal
    • F16C33/543—Cages for rollers or needles made from wire, strips, or sheet metal made from sheet metal from a single part
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C19/00—Bearings with rolling contact, for exclusively rotary movement
    • F16C19/22—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings
    • F16C19/34—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load
    • F16C19/36—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers
    • F16C19/364—Bearings with rolling contact, for exclusively rotary movement with bearing rollers essentially of the same size in one or more circular rows, e.g. needle bearings for both radial and axial load with a single row of rollers with tapered rollers, i.e. rollers having essentially the shape of a truncated cone
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16C—SHAFTS; FLEXIBLE SHAFTS; ELEMENTS OR CRANKSHAFT MECHANISMS; ROTARY BODIES OTHER THAN GEARING ELEMENTS; BEARINGS
    • F16C2300/00—Application independent of particular apparatuses
    • F16C2300/02—General use or purpose, i.e. no use, purpose, special adaptation or modification indicated or a wide variety of uses mentioned

Definitions

  • the present invention relates to a retainer for a roller bearing, and more particularly, to a retainer for a roller bearing that is configured to reduce the area contacted with rollers thus to decrease the frictional force against the rollers, to guide the movement of lubricant thus to help the lubricant gently flow, to reduce all of the torque, vibration, abrasion and noise caused by the roller bearing thus to improve the performance of the roller bearing and thus to extend the life span thereof, and further to avoid the occurrence of the weakness of the strength thereof according to the reduction of the sectional areas of bars thus to prevent the load capability and the life span from being diminished.
  • Roller bearings are largely classified into sliding bearings, ball bearings, and roller bearings.
  • the roller bearings are widely used because they have relatively low rotational speeds and high supporting load and are available when substantially strong impacts are applied thereto.
  • they are sub-classified into cylindrical roller bearings, tapered roller'bearings, needle roller bearings and spherical roller bearings.
  • FIG. 1 is a sectional view showing a conventional tapered roller bearing
  • FIG. 2 is a perspective view showing a retainer for a tapered roller bearing according to one conventional practice
  • FIG. 3 is a schematic sectional view taken along the line A-A of FIG. 2 .
  • two rollers are put into the retainer of FIG. 2 .
  • the tapered roller bearing 1 includes an inner race 10 , an outer race 20 , tapered rollers 30 and a retainer 50 .
  • the retainer 50 is disposed to allow the tapered rollers 30 to be circumferentially spaced apart from each other in the space between the inner race 10 and the outer race 20 , while preventing the tapered rollers 30 from being contacted with each other.
  • the retainer 50 has a generally cup-like shape and includes a large-diametered upper rim 45 , a small-diametered lower rim 55 , a plurality of rectangular roller-receiving windows 75 circumferentially spaced, apart from each other in the space between the upper rim 45 and the lower rim 55 , and a plurality of bars 65 disposed respectively between the adjacent roller-receiving windows 75 .
  • each of the roller-receiving windows 75 is defined by the combination of the upper rim 45 , the lower rim 55 and the bars 65 formed at the both sides thereof.
  • the rollers 30 are rotatably inserted into the rectangular-shaped roller-receiving windows 75 and are rollable in such a manner as to be spaced apart from each other.
  • the roller-receiving windows 75 for the tapered roller bearing have a generally trapezoidal shape.
  • each of the plurality of bars 65 has chamfered face portions 67 formed along the edges of the both sides, thereof, that is, along the inside edges toward the rollers 30 , and the chamfered face portions 67 are formed inclinedly toward the center of the both sides thereof in such a manner as to be brought into contact with the rollers 30 and also to prevent the rollers 30 from being deviated toward the outside of the roller-receiving windows 75 .
  • Each bar 65 having the chamfered face portions 67 has a sectional shape of a hexagon rounded at the inner and outer sides.
  • the upper rim 45 and the lower rim 55 have a shape of a round ring.
  • the retainer 50 wherein the rollers 30 are received is disposed between the inside race 10 and the outside race 20 of the roller bearing 1 .
  • the roller bearing 1 is operated in a state of applying lubricant or grease thereto.
  • the rollers 30 rollably received in the retainer 50 are contacted along the outer peripheral surfaces thereof with the chamfered face portions 67 of the bars 65 to cause substantially large contacted area with the chamfered face portions 67 , which unfortunately makes the torque and vibration of the roller bearing substantially increased.
  • the lubricant does not flow easily between the bars 65 and the rollers 30 .
  • the space between the inner race 10 and the retainer 50 is defined as inside space and the space between the outer race 20 and the retainer as outer space, the lubricant does not flow gently from the inside space toward the outer space.
  • the lubricant flowing into the outer space is discharged easily to the outside of the roller bearing 1 , but the lubricant flowing into the inside space is not discharged easily by means of a large-sized projection 11 formed along the inner race 10 and stays therein. Accordingly, the torque of the roller bearing 1 is increased by the occurrence of the stirring resistance of the lubricant staying in the inside space.
  • the increase in the torque of the roller bearing 1 causes the roller bearing 1 used for the gentle rotation of mechanical members like a driving shaft to be deteriorated in the quality of performance thereof, and moreover, load may be excessively applied to the retainer 50 during the use of the roller bearing 1 to cause the retainer 50 to be broken, thereby shortening the average life span of the retainer 50 .
  • FIG. 4 is a perspective view showing a retainer for a tapered roller bearing according to another conventional practice, so as to solve the above-mentioned conventional problems.
  • a retainer 50 ′ for a tapered roller bearing having a plurality of bars 65 ′ increased partially in their circumferential width.
  • the retainer 50 ′ does not have any trapezoidal roller-receiving windows and linear bars and is provided with the bars 65 ′ each having a sectional area increased on a partial section in the middle portion thereof, such that only the partial sections of the bars 65 ′ are brought into contact with the rollers 30 to cause the contacted area between the rollers 30 and the bars 65 ′ to be substantially reduced, thereby allowing the torque of the roller bearing to be desirably decreased.
  • the bars 65 ′ of the retainer 50 ′ should be formed having the middle portions increased circumferentially in their width, while being not reduced in the their upper and lower widths in the circumferential direction thereof. Accordingly, the number of the bars 65 ′, that is, the number of a plurality of roller-receiving windows 75 ′ should be unavoidably decreased in order to make the bearings having the same sizes. Thus, the number of rollers 30 constituting the roller bearing is also reduced, which causes the load supported by the roller bearing to be decreased, and if die same load is applied to the roller bearing, the life span thereof becomes shortened.
  • roller-receiving windows 75 ′ of the retainer 50 ′ become complicated in their shape, and for example, so as to make the retainer 50 ′, after a metal plate is formed to a cup-like shape, the plurality of roller-receiving windows 75 ′ is formed thereon through shearing. In this case, actually, it is difficult to make the retainer 50 ′.
  • the present invention has been made in view of the above-mentioned problems occurring in the prior art, and it is an object of the present invention to provide a retainer for a roller bearing that has a chamfered face portion formed inclinedly on the edges of both sides of each of bars with which rollers are contacted, the chamfered face portion having one or more first chamfered face sections and one or more second chamfered face sections having different protruding heights from each other, thereby minimizing the contacted area with the rollers without any increase and decrease of the circumferential width of the bars and allowing lubricant to gently flow.
  • a retainer for a roller bearing haying any one or more of ring-like upper and lower rims and a plurality of bars connected at their ends to any one or more of the upper and lower rims in such a manner as to be circumferentially spaced apart from each other, the retainer including a chamfered face portion formed on each, edge of both sides of each of the plurality of bars and, having a plurality of first chamfered face sections adapted to be brought into direct contact with rollers and a plurality of second chamfered face sections formed more concaved than the plurality of first chamfered face sections.
  • the chamfered face portion includes at least one or more, first and second chamfered face sections formed thereon.
  • the chamfered face portion further includes an inclined end portion formed at one or more positions wherein each of the first chamfered face sections and each of the second chamfered face sections face each other in such a manner as to be inclined upwardly or downwardly from the outside to the inside along the direction of width of the chamfered face portion.
  • the first chamfered face sections are protruded to a predetermined curvature in at least one or more directions of the length and width of the chamfered face portion.
  • the chamfered face portion includes an inclined end portion formed at any one or more of the upper and lower ends of the first chamfered face sections connected to the second chamfered face sections in such a manner as to be inclined upwardly or downwardly from the outside to the inside along the direction of width of the chamfered face portion.
  • the second chamfered face sections have inclined angles larger than the first chamfered face sections with respect to the lines extended toward the widthwise centers of the plurality of bars from the central axis lines of the upper rim and the lower rim.
  • each of the second chamfered face sections has inlet and outlet clearances formed between them and the rollers, the inlet clearance formed toward the inside thereof being larger than the outlet clearance formed toward the outside thereof.
  • FIG. 1 is a sectional view showing a conventional tapered roller bearing
  • FIG. 2 is a perspective view showing a retainer for a tapered roller bearing according to one conventional practice
  • FIG. 3 is a schematic sectional view taken along the line A-A of FIG. 2 ;
  • FIG. 4 is a perspective view showing a retainer for a tapered roller bearing according to another conventional practice
  • FIG. 5 is a perspective view showing a retainer for a roller bearing according to the present invention.
  • FIGS. 6 and 7 are sectional views showing the chamfered face portions of the retainer for a roller bearing according to the present invention.
  • FIG. 8 is a sectional view showing another chamfered face portions of the retainer for a roller bearing according to the present invention.
  • FIGS. 9 and 10 are sectional views showing still another chamfered face portions of the retainer for a roller bearing according to the present invention.
  • FIG. 11 is a sectional view showing the semi-spherical chamfered face portions of the retainer for a roller bearing according to the present invention.
  • FIG. 12 is a sectional view showing the semi-cylindrical chamfered face portions of the retainer for a roller bearing according to the present invention.
  • FIG. 13 is a sectional view showing another semi-cylindrical chamfered face portions of the retainer for a roller bearing according to the present invention.
  • FIG. 14 is a top sectional view showing the chamfered face portions of the retainer for a roller bearing according to the present invention.
  • the direction of I-I in FIG. 7 is defined as the width direction of a chamfered face portion, and the direction of II-II therein as the length direction thereof.
  • FIG. 5 is a perspective view showing a retainer for a roller bearing according to the present invention
  • FIGS. 6 and 7 are sectional views showing the chamfered face portions of the retainer for a roller bearing according to the present invention
  • FIG. 8 is a sectional, view showing another chamfered face portions of the retainer for a roller bearing according to the present invention
  • FIGS. 9 and 10 are sectional views showing still another chamfered face portions of the retainer for a roller bearing according to the present invention
  • FIG. 11 is a sectional view showing the semi-spherical chamfered face portions of the retainer for a roller bearing according to the present invention
  • FIG. 12 is a sectional view showing the semi-cylindrical chamfered face portions of the retainer for a roller bearing according to the present invention
  • FIG. 13 is a sectional view showing another semi-cylindrical chamfered face portions of the retainer for a roller bearing according to the present invention
  • FIG. 14 is a top sectional view showing the chamfered face portions of the retainer for a roller bearing according to the present invention.
  • a retainer 100 for a roller bearing largely includes an upper rim 110 , a lower rim 120 and a plurality of bars 150 .
  • the retainer 100 for a roller bearing may include any one of the upper rim 110 and the lower rim 120 and the plurality of bars 150 connected at their one ends to any one of the upper rim 110 and the lower rim 120 and free at the other ends thereof.
  • the upper rim 110 and the lower rim 120 have a shape of a round ring to constitute the upper and lower portions of the retainer 100 , and further, a plurality of roller-receiving windows 130 are circumferentially spaced apart from each other in the space between the upper rim 110 and the lower rim 120 .
  • the plurality of bars 150 is disposed respectively between the roller-receiving windows 130 to each other.
  • the roller-receiving windows 130 are of a generally rectangular shape and are circumferentially spaced apart from each other by a predetermined distance in the space between the upper rim 110 and the lower rim 120 in such a manner as to receive rollers 30 thereinto.
  • the roller-receiving windows 130 In case of a tapered roller bearing, the roller-receiving windows 130 have a generally trapezoidal shape.
  • the plurality of bars 150 is connected to the upper rim 110 at the top ends thereof and to the lower rim 120 at the bottom ends thereof in such a manner as to be disposed respectively between the roller-receiving windows 130 adjacent to each other, thereby defining the roller-receiving windows 130 together with the upper rim 110 and the lower rim 120 .
  • the rollers 30 are received into the roller-receiving widows 130 .
  • each of the plurality of bars 150 has a chamfered face portion 155 formed inclinedly on each edge of the both sides on which each roller 30 is placed, and the chamfered face portion 155 is brought into contact with the roller 30 .
  • the chamfered face portion 155 is formed on each inner edge of both sides of each bar 150 toward the roller 30 .
  • each bar 150 may have the section convexedly curved inwardly, and the chamfered face portions 155 of the bar 150 may be the portions rounded at the both sides curved inwardly.
  • Each of the chamfered face portions 155 includes first chamfered face sections 151 and second chamfered face, sections 153 , and the first chamfered face sections 151 are protrudedly formed at predetermined positions of each chamfered face portion 155 in such a manner as to be directly contacted with the rollers 30 .
  • the second chamfered face sections 153 are formed more concaved than the first chamfered face sections 151 in such a manner as to be spaced apart from the rollers 30 to form clearances between the roller 30 and them.
  • FIG. 5 shows an embodiment wherein the first chamfered face sections 151 formed at the chamfered face portions 155 formed on the both sides of each bar 150 have the same positions as each other, but of course, they may be formed in different positions from each other on the both sides of each bar 150 .
  • first chamfered face sections 151 and the second chamfered face sections 153 have continual or discontinuous steps thereon, and any one or more of the upper and lower ends of each of the first chamfered face sections 151 have an inclined end portion 152 inclined upwardly or downwardly from the outside to the inside along the direction of width of the chamfered face portion 155 .
  • the upper ends A and the lower ends B of the first chamfered face sections 151 may be formed without any inclination.
  • the inclined directions of the inclined end portion 152 can be adjusted in accordance with the applied part thereof, the available environment, and the requirements (for example, torque, lubrication, and so on).
  • the examples of the inclined directions of the inclined end portion 152 will be explained with reference to FIGS. 6 to 10 .
  • first, two or more first chamfered face sections 151 are formed, and the second chamfered face sections 153 are formed respectively between the first chamfered face sections 151 and at the upper and lower sides of the first chamfered face sections 151 .
  • the second chamfered face section 153 may be formed only between the first chamfered face sections 151 .
  • the inclined end portion 152 is formed along the lower end of each first chamfered face section 151 in such a manner as to be inclined upwardly or downwardly from the outside to the inside, along the direction of width of the chamfered face portion 155 .
  • FIG. 6 shows the inclined end portion 152 inclined upwardly, wherein when the lubricant is supplied to the inside and outside of the lower rim 120 , the lubricant flowing to the inside of the lower rim 120 partially flows outwardly by a centrifugal force and is thus guided to flow toward the inside again by means of the inclined end portion 152 , thereby gently flowing to the inside of the retainer 100 .
  • FIG. 7 shows the inclined end portion 152 inclined downwardly, wherein when the lubricant is supplied to the inside and outside of the lower rim 120 , the lubricant flowing to the inside of the lower rim 120 partially flows outwardly by a centrifugal force and is thus guided to flow toward the outside by means, of the inclined end portion 152 , thereby gently flowing to the outside of the retainer 100 .
  • the upward and downward inclinations of the inclined end portion 152 are determined differently in accordance with the viscosity of the lubricant, and for example, if the lubricant has similar viscosity to desirably, the inclined end portion 152 is inclined downwardly from the outside to the inside along the direction of width of the chamfered face portion 155 .
  • the lubricant having the similar viscosity to oil is rapidly passed through the rollers 30 , the inner race 10 and the outer race 20 , without any staying at the inside of the retainer 100 , thereby reducing friction force and heat.
  • the lubricant is guided to the outside of the retainer 100 .
  • the inclined end portion 152 is inclined upwardly, from the outside to the inside along the direction of width of the chamfered face portion 155 . Since the lubricant having similar viscosity to grease should flow actively at the inside of the retainer 100 , when compared with the lubricant having similar viscosity to oil rapidly-passed through the rollers 30 , the inner race 10 and the outer race 20 , the lubricant is guided to the space between the rollers 30 and the inner race 10 and to flow therebetween.
  • first chamfered face sections 151 are formed, and the second chamfered face sections 153 , are formed respectively between the first chamfered face sections 151 and at the upper and lower sides of the first chamfered face sections 151 .
  • the second chamfered face section 153 may be formed only between the first chamfered face sections 151 .
  • the inclined end portion 152 is formed along the upper end of each first chamfered face section 151 in such a manner as to be inclined downwardly from the outside to the inside along the direction of width of the chamfered face portion 155 .
  • the inclined end portion 152 is inclined downwardly wherein when the lubricant is supplied to the inside and outside of the lower rim 120 , the lubricant flowing to the inside of the lower rim 120 partially flows outwardly and is thus guided to flow toward the outside again by means of the inclined end portion 152 , thereby gently flowing to the outside of the retainer 100 .
  • first chamfered face sections 151 are formed, and the second chamfered face sections 153 are formed respectively between the first chamfered face sections 151 and at the upper and lower sides of the first chamfered face sections 151 .
  • the second chamfered face section 153 may be formed only between the first chamfered face sections 151 .
  • the inclined end portion 152 is formed along the upper and lower ends of each first chamfered face section 151 , respectively, in such a manner as to be inclined upwardly or downwardly from the outside to the inside along the direction of width of the chamfered face portion 155 .
  • each first chamfered face section 151 is inclined upwardly from the outside to the inside along the direction of width of the chamfered face portion 155
  • the inclined end portion 152 formed along the lower end of each first chamfered face section 151 is inclined upwardly from the outside to the inside along the direction of width of the chamfered face portion 155 .
  • each first chamfered face section 151 is inclined downwardly from the outside, to the inside along the direction of width of the chamfered face portion 155
  • the inclined end portion 152 formed along the lower end of each first chamfered face section 151 is inclined downwardly from the outside to the inside along the direction of width of the chamfered face portion 155 .
  • first chamfered face sections 151 ′ are formed protrudedly to a predetermined curvature along the directions of length and width of each chamfered face portion 155 in such a manner as to be brought into contact with the rollers 30 at, the center portions thereof.
  • two or more first chamfered face sections 151 ′ are formed, and second chamfered face sections 153 ′ are formed respectively between the first chamfered face sections 151 ′ and at the upper and lower sides of the first chamfered face sections 151 ′.
  • Each of the first chamfered face sections 151 ′ is formed of a generally semispherical shape, such that the sectional shape of A-A and that of B-B are the same as each other.
  • the first chamfered face sections 151 ′ may have a generally semioval shape.
  • the first chamfered face sections 151 ′ having a semispherical or semioval shape are brought into point-contact with the rollers 30 , thereby substantially reducing the frictional force therebetween and increasing the areas of the second chamfered face sections 153 ′ through which the lubricant flows to allow the torque and vibration caused by the roller bearing to be greatly diminished.
  • first chamfered face sections 151 ′′ are extended protrudedly to the direction of width of the chamfered face portion 150 with a predetermined curvature along the direction of length of the chamfered face portion 155 in such a manner as to be brought into contact with the rollers 30 .
  • first chamfered face sections 151 ′′ are formed, and second chamfered face sections 153 ′′ are formed respectively between the first chamfered face sections 151 ′′ and at the upper and lower sides of the first chamfered face sections 151 ′′.
  • the second chamfered face section 153 ′′ may be formed only between the first chamfered face sections 151 ′′.
  • the first chamfered face sections 151 ′′ are formed of a generally semicylindrical shape, and thus, they are brought into contact with the rollers 30 , thereby substantially reducing the frictional force therebetween and also diminishing the torque and vibration caused by the roller bearing.
  • each of the first chamfered face sections 151 ′′ has an inclined end portion 152 ′′ formed at any one or more of the upper and lower ends connected to each of the second chamfered face sections 153 ′′.
  • the upper part from the most protruded portion of the semicylindrical first chamfered face section 151 ′′ is defined as the upper end, and the lower part therefrom as the lower end.
  • the inclined end portion 152 ′′ is inclined upwardly or downwardly from the outside to the inside along the direction of width of the chamfered face portion 155 .
  • the inclined end portion 152 ′′ is formed at the lower end of the first chamfered face section 151 ′′ in such a manner as to be inclined upwardly from the outside to the inside along the direction of width of the chamfered face portion 155 .
  • the inclined end portion 152 ′′ is formed at the lower end of the first chamfered face section 151 ′′ in such a manner as to be inclined downwardly from the outside to the inside along the direction of width of the chamfered face portion 155 .
  • the inclined end portion 152 ′′ is, formed at the upper end of the first chamfered face section 151 ′′ in such a manner as to be inclined downwardly from the outside to the inside along the direction of width of the chamfered face portion 155 .
  • the lubricant flowing, to the inside of the lower rim 120 partially flows and is, guided toward the outside by means of the inclined end portion 152 ′′, thereby gently flowing to the outside of the retainer 100 .
  • the inclined end portion 152 ′′ is formed at the upper and lower ends of the first chamfered face section 151 ′′, respectively, in such a manner as to be inclined upwardly from the outside to the inside along the direction of width of the chamfered face portion 155 .
  • the inclined end portion 152 ′′ is formed at the upper and lower ends of the first chamfered face section 151 ′′, respectively, in such a manner as to be inclined downwardly from the outside to the inside along the direction of width of the chamfered face portion 155 .
  • the inclined directions of the inclined end portion 152 ′′ are determined differently in accordance with the viscosity of the lubricant, and if the lubricant has similar viscosity to grease, desirably, the inclined end portion 152 ′′ is inclined upwardly such that the lubricant flowing to the inside is guided again toward the inside, thereby gently flowing to the inside of the retainer 100 . Contrarily, if the lubricant has similar viscosity to oil, desirably, the inclined end portion 152 ′′ is inclined downwardly such that the lubricant flowing to the inside is guided toward the outside, thereby gently flowing to the outside of the retainer 100 .
  • the second, chamfered face section 153 has a different inclined angle from the first chamfered face section 151 .
  • the second chamfered face section 153 has the inclined angle larger than the first chamfered face section 151 with respect to the lines extended toward the widthwise centers of the plurality of bars 150 from the central axis lines of the upper rim 110 and the lower rim 120 .
  • the flowing passageway of the lubricant is ensured to diminish the frictional force and heat between the rollers 30 and the retainer 100 , which allows the torque and vibration of the roller bearing to be substantially reduced.
  • the retainer 100 is mounted to the roller bearing, and when the rollers 30 are disposed between the bars 150 and the roller bearing is operated, the lubricant partially flows from the inside to the outside through clearances formed between the second chamfered face sections 153 and the rollers 30 .
  • the second chamfered face section 153 is desirably formed wherein an inlet clearance A formed toward the inside thereof is formed larger than an outlet clearance B formed toward the outside thereof.
  • the second chamfered face section 153 is desirably formed wherein the maximum distance between the second chamfered face section 153 and the first chamfered face section 151 at the inside thereof is longer than the maximum distance between them at the most outside thereof.
  • the formation of the clearance toward the outside as described above means the opening toward the outside space. This includes the vertical orientation toward the outside and anything having components toward the outside. In the same manner as above, the formation of the clearance toward the inside as described above means the opening toward the inside space.
  • the second chamfered face section 153 Under the formation of the second chamfered face section 153 as described above, when the lubricant flows to the inlet clearance A at the inside of the second chamfered face section 153 and then flows to the outside thereof through the outlet clearance B, a predetermined pressure is formed between the second chamfered face section 153 and the rollers 30 , and an external force is made on the rollers 30 in a direction distant from the second chamfered face section 153 . Accordingly, the direction contact between the rollers 30 and the first chamfered face section 151 can be minimized and further avoided, thereby permitting the frictional force caused between the rollers 30 and the retainer 100 to be greatly reduced.
  • FIG. 14 shows the second chamfered face section 153 having a linear surface, but it may have a concavedly curved surface or a variety of surfaces.
  • the retainer for a roller bearing according to the present invention does not need the increase in the circumferential widths of the bars defining the roller-receiving windows, that is, the sectional areas of the bars, thereby preventing the reduction of the number of rollers when the roller bearing is made, while still maintaining the strength of the bars, reducing the frictional force between the bars and the rollers through the decrease in the contact area therebetween, allowing the lubricant to gently flow to reduce the frictional force of the rollers, diminishing the torque and vibration of the roller bearing and the abrasion and noise caused therefrom, and providing the improvement in the performance of the roller bearing and the extension of the life span thereof.
US12/856,572 2009-11-24 2010-08-13 Retainer for roller bearing Abandoned US20110123143A1 (en)

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
KR10-2009-0113767 2009-11-24
KR1020090113767A KR101076099B1 (ko) 2009-11-24 2009-11-24 롤러 베어링용 리테이너 및 그 제조방법
KR10-2010-0038066 2010-04-23
KR1020100038066A KR20110118457A (ko) 2010-04-23 2010-04-23 롤러 베어링용 리테이너

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JP (1) JP5279093B2 (ja)
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DE (1) DE102010034254B4 (ja)

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CN102287443A (zh) * 2011-06-07 2011-12-21 佛山市永力泰车轴有限公司 带储油分隔体的滚子轴承
CN102817919A (zh) * 2011-12-13 2012-12-12 洛阳轴研科技股份有限公司 一种圆锥滚子轴承及该轴承用保持架
US20140010615A1 (en) * 2012-07-09 2014-01-09 Kinichi KAWAKAMI Low torque nut
US20160084311A1 (en) * 2014-09-24 2016-03-24 Aktiebolaget Skf Rolling-element bearing cage
US9995341B2 (en) 2013-04-04 2018-06-12 Nsk Ltd. Resin cage for tapered roller bearing and tapered roller bearing including the resin cage
US10302131B2 (en) 2012-12-25 2019-05-28 Nsk Ltd. Tapered roller bearing
US10330146B2 (en) * 2015-08-27 2019-06-25 Ntn Corporation Retainer and tapered roller bearing
CN112963442A (zh) * 2021-04-09 2021-06-15 山东欧冶轴承有限公司 一种连铸机专用满装滚子移位轴承
US11143235B2 (en) * 2016-03-18 2021-10-12 Ntn Corporation Tapered roller bearing

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EP2904282B1 (en) * 2012-10-04 2020-01-22 Aktiebolaget SKF Bearing cage&rolling element bearing
CN104718388A (zh) * 2012-10-04 2015-06-17 Skf公司 轴承保持架和滚动元件轴承
CN106642643A (zh) * 2016-11-09 2017-05-10 珠海格力电器股份有限公司 卡扣组件及壁挂机

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Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102287443A (zh) * 2011-06-07 2011-12-21 佛山市永力泰车轴有限公司 带储油分隔体的滚子轴承
CN102817919A (zh) * 2011-12-13 2012-12-12 洛阳轴研科技股份有限公司 一种圆锥滚子轴承及该轴承用保持架
CN102817919B (zh) * 2011-12-13 2014-07-16 洛阳轴研科技股份有限公司 一种圆锥滚子轴承及该轴承用保持架
US20140010615A1 (en) * 2012-07-09 2014-01-09 Kinichi KAWAKAMI Low torque nut
US10302131B2 (en) 2012-12-25 2019-05-28 Nsk Ltd. Tapered roller bearing
US9995341B2 (en) 2013-04-04 2018-06-12 Nsk Ltd. Resin cage for tapered roller bearing and tapered roller bearing including the resin cage
US20160084311A1 (en) * 2014-09-24 2016-03-24 Aktiebolaget Skf Rolling-element bearing cage
US10330146B2 (en) * 2015-08-27 2019-06-25 Ntn Corporation Retainer and tapered roller bearing
US11143235B2 (en) * 2016-03-18 2021-10-12 Ntn Corporation Tapered roller bearing
CN112963442A (zh) * 2021-04-09 2021-06-15 山东欧冶轴承有限公司 一种连铸机专用满装滚子移位轴承

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JP2011112222A (ja) 2011-06-09
DE102010034254B4 (de) 2013-02-14
JP5279093B2 (ja) 2013-09-04
DE102010034254A1 (de) 2011-07-28
CN102072255A (zh) 2011-05-25

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